Critical Dream Knowledge

I learned the following in a dream last night (it seemed so urgent that I used extreme force of will to remember it after awakening):

Mezzo sopranos will have a stillborn baby every sixth pregnancy.

Also: there are six scientific "flavors" of woman, four of which are "French," "Scotch-Irish," "Mezzo-Soprano," and "Puerto Rican". I could not learn the other two flavors - and it was driving me crazy all night trying to imagine how just two more could possibly categorize all the rest. But I finally decided it was like quarks, whose "flavors" are categorized with capricious adjectives ("up", "down", "strange", "charm", "top", and "bottom").

If so, "French," "Scotch-Irish," "Mezzo-Soprano," and "Puerto Rican" women may not literally be those things. A Sri Lankan might be, scientifically, "Puerto Rican" or "Mezzo Soprano."

Discuss?